1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2003 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 5 This file is part of libunwind. 6 7 Copyright (c) 2003 Hewlett-Packard Co. 8 9 Permission is hereby granted, free of charge, to any person obtaining 10 a copy of this software and associated documentation files (the 11 "Software"), to deal in the Software without restriction, including 12 without limitation the rights to use, copy, modify, merge, publish, 13 distribute, sublicense, and/or sell copies of the Software, and to 14 permit persons to whom the Software is furnished to do so, subject to 15 the following conditions: 16 17 The above copyright notice and this permission notice shall be 18 included in all copies or substantial portions of the Software. 19 20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 27 28 /* This test program checks whether proc_info lookup failures are 29 cached. They must NOT be cached because it could otherwise turn 30 temporary failures into permanent ones. Furthermore, we allow apps 31 to return -UNW_ESTOPUNWIND to terminate unwinding (though this 32 feature is deprecated and dynamic unwind info should be used 33 instead). */ 34 35 #include <stdio.h> 36 #include <string.h> 37 38 #include <libunwind.h> 39 #include "compiler.h" 40 41 int errors; 42 43 #define panic(args...) \ 44 { ++errors; fprintf (stderr, args); return -1; } 45 46 static int 47 find_proc_info (unw_addr_space_t as UNUSED, 48 unw_word_t ip UNUSED, 49 unw_proc_info_t *pip UNUSED, 50 int need_unwind_info UNUSED, 51 void *arg UNUSED) 52 { 53 return -UNW_ESTOPUNWIND; 54 } 55 56 static int 57 access_mem (unw_addr_space_t as UNUSED, 58 unw_word_t addr UNUSED, 59 unw_word_t *valp, int write, 60 void *arg UNUSED) 61 { 62 if (!write) 63 *valp = 0; 64 return 0; 65 } 66 67 static int 68 access_reg (unw_addr_space_t as UNUSED, 69 unw_regnum_t regnum UNUSED, 70 unw_word_t *valp, int write, 71 void *arg UNUSED) 72 { 73 if (!write) 74 *valp = 32; 75 return 0; 76 } 77 78 static int 79 access_fpreg (unw_addr_space_t as UNUSED, 80 unw_regnum_t regnum UNUSED, 81 unw_fpreg_t *valp, int write, 82 void *arg UNUSED) 83 { 84 if (!write) 85 memset (valp, 0, sizeof (*valp)); 86 return 0; 87 } 88 89 static int 90 get_dyn_info_list_addr (unw_addr_space_t as UNUSED, 91 unw_word_t *dilap UNUSED, 92 void *arg UNUSED) 93 { 94 return -UNW_ENOINFO; 95 } 96 97 static void 98 put_unwind_info (unw_addr_space_t as UNUSED, 99 unw_proc_info_t *pi UNUSED, 100 void *arg UNUSED) 101 { 102 ++errors; 103 fprintf (stderr, "%s() got called!\n", __FUNCTION__); 104 } 105 106 static int 107 resume (unw_addr_space_t as UNUSED, 108 unw_cursor_t *reg UNUSED, 109 void *arg UNUSED) 110 { 111 panic ("%s() got called!\n", __FUNCTION__); 112 } 113 114 static int 115 get_proc_name (unw_addr_space_t as UNUSED, 116 unw_word_t ip UNUSED, 117 char *buf UNUSED, 118 size_t buf_len UNUSED, 119 unw_word_t *offp UNUSED, 120 void *arg UNUSED) 121 { 122 panic ("%s() got called!\n", __FUNCTION__); 123 } 124 125 int 126 main (int argc, char **argv) 127 { 128 unw_accessors_t acc; 129 unw_addr_space_t as; 130 int ret, verbose = 0; 131 unw_cursor_t c; 132 133 if (argc > 1 && strcmp (argv[1], "-v") == 0) 134 verbose = 1; 135 136 memset (&acc, 0, sizeof (acc)); 137 acc.find_proc_info = find_proc_info; 138 acc.put_unwind_info = put_unwind_info; 139 acc.get_dyn_info_list_addr = get_dyn_info_list_addr; 140 acc.access_mem = access_mem; 141 acc.access_reg = access_reg; 142 acc.access_fpreg = access_fpreg; 143 acc.resume = resume; 144 acc.get_proc_name = get_proc_name; 145 146 as = unw_create_addr_space (&acc, 0); 147 if (!as) 148 panic ("unw_create_addr_space() failed\n"); 149 150 unw_set_caching_policy (as, UNW_CACHE_GLOBAL); 151 152 ret = unw_init_remote (&c, as, NULL); 153 if (ret < 0) 154 panic ("unw_init_remote() returned %d instead of 0\n", ret); 155 156 ret = unw_step (&c); 157 if (ret != -UNW_ESTOPUNWIND) 158 panic ("First call to unw_step() returned %d instead of %d\n", 159 ret, -UNW_ESTOPUNWIND); 160 161 ret = unw_step (&c); 162 if (ret != -UNW_ESTOPUNWIND) 163 panic ("Second call to unw_step() returned %d instead of %d\n", 164 ret, -UNW_ESTOPUNWIND); 165 166 unw_destroy_addr_space (as); 167 168 if (verbose) 169 printf ("SUCCESS\n"); 170 return 0; 171 } 172